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20 Cards in this Set
- Front
- Back
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Which EKG component represents atrial depolarization |
P wave |
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Which EKG component represents ventricular repolarization |
T wave |
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Which EKG component represents ventricular depolarization |
QRS complex |
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90% of ventricular filling occurs before which EKG component |
P wave |
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What percentage of ventricular filling does atrial contraction account for? |
~ Normally 10%. ~ During high heart rate up to 40% atrial kick |
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Which heart sound is sometimes noted during atrial contraction? |
S4 |
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Closure of the AV valves results in which heart sound? |
S1 |
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What is the c wave believed to occur from in the atrial pressure graph? |
Bulging of the mitral valve leaflets back into the left atrium |
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During systole, when is maximum flow velocity reached in the ejection phase of the left ventricle? |
Rapid ejection phase 3 |
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What is the most important component of blood ejection from the left ventricle? |
Left ventricular ejection fraction |
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What would you normally hear during the ejection period In a healthy individual |
No sound |
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What causes the S2 sound |
The abrupt closing of the semilunar valves |
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Wiggers diagram phases: AV open AV closed |
~ open = 1-6-7
~ closed = 2-3-4-5 |
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Wiggers diagram phases: SLV open SLV closed |
~ open = 3-4
~closed = 1-2-5-6-7 |
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Which phase is IVCT? |
Phase 2 |
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Which phase is IVRT? |
Phase 5 |
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Which heart sound is associated with the dicrotic notch? |
S2 |
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What events occur after the second heart sound? |
~ IVRT ~ diastole |
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DEF: Lusitropy |
The rate of myocardial relaxation. |
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What is the normal ESV in the L. Ventricle? |
~ 50 mls |
